Fulcrum and method of making the same



C.'-E'. BAUER.

FULCRUM AND METHOD OF MAKING THE SAME- APPLICATION FILED on. 18. 1920.

1 42mm Patented Aug. 22, 1922. I r I 2 SHEETS-SHEET l.

C. E. BAUER.

FULCRUM AND METHOD OF MAKING THE SAME.

APPLICATION FILED ocT. I8. 1920.

11,426,705. Patented Aug. 229 1922:.

2 SHEETSSHEET 2.

CARL E. BAUER, OF HAMMOND, INDIANA.

FULCRUM AND METHOD OF MAKING THE SAM-E.

Application Ifileli Gctober 18, 1920.

T 0 all 10.7mm ii -mcz cmwcmi:

Be it known that 1, Cam. E. Emma, a citizen of the United States, andresident of Hammond, in the county of Lake and State of Indiana, haveinvented certain new and useful Improvements in a Fulcrum and Method ofMaking the Same, of which-the fol-lowing is a specification.

My invention relates to brake beam fulcruins and particularly to a:novel method of producing such fulcrums in :a simple and economicalmanner.

One of the objects of my invention is to provide a fulcrum adapted foruse in connection with trussed brake beams which employ an angularcompression member and a rod tension member. Such .fulcrums or strutsare subjected to unusual strains, due to the fact that the device acts.not only as a strut for the truss but also as a fulcrum for the brakelever. In the fulcrum of my .invention I provide two bars of duplicateform, then suitably bend and twist the same. then punch a small opening,the metal being merely laterally displaced instead of being removed, thedisplaced metal. on the two bars being complementary, whereby thedisplaced metal of one bar enters the opening formed by punching themating 'bar. Thereafter the bars are forged to spread the metal andincrease the size of the opening to that required for the accommodationof the tension rod.

The invention will be more readily understood by reference 'to theaccompanying drawings, in which,

Figure 1 is a side view of a blank such as I employ;

Fig. 2 is a view after the initial punching and shaping operation;

Fig. 3 is a view taken at right angles to that of Fig. 2;

Fig. 4 is a view similar to Fig. 3 of the form of mating bar;

Fig. 5 shows the bars joined at the beginning of the forging operation;

Fig. 6 shows the completion of the forging operation;

Fig. 7 is a view of the completed fulcrum;

Fig. 8 is a view of a modified form of fulcrum at the point receding theforging operation; I

Fi 9 is a sectional view on the cf Fig. 3;

line 9 9 Specification of Letters Patent. Patgnted Aug, '22, 1922,

Serial No. 417,639.

Fig. 10 is aside view of the fulcrum-shown in Fig. 8;

Fig. 11 is a sectional-view through the dies employed for completing theforging operation;-and V I i Figs. 12 and 13 are viewsof'th'e-comp-leted fulcrum.

Referring to the drawings it will be seen that I' provide a pair ofduplicate :flat bars, one of which is illustrated in Fig. :1. In aforging operation one end of each bar may be bent at right angles toform the foot 10 and the twisted intermediate portion 1]. The portion 11may have an aperture 12 for a brake rod pivot pin and the straight projecting end portion 1.3 may have an aperture 14 for attachment of asupporting link. A punch of suitable shape may lie-employed for formingthe semicircular aperture 1 5 and the smaller concentric semicircularaperture 1-6, the metal originally occupying said openings, being merelydisplaced laterally as indicated at 17 and acting as aflfiller, or inother words as a :means for furnishing a supply of metal for reinforcingthe aperture. The apertures 15, 16, and the displaced metal or "filler'17 will be reversed-as indicated in Figs. 8 and l, the portion 18 of:metal on one bar being adapted to enter the aperture 15 in the otherbar while a similar action takes place between the metal 17 and thecorresponding aperture in the other bar. Thus the two bars having theintermediate parallel portions 19. '20 will occupy the position shown inFig. 5 and there will remain a small through openingformed by thesemicircular recess ]:6 in the bars. This opening permits the entranceof the pointed end 21 of a forging tool 22. By the cooperation of a topdie 23, as shown in Fig. 6, the metal at the junction of the two bars isflared, the size of the opening is increased and the portions 17, 18 ofmetal are riveted over, thus firmly uniting the two bars and providing asuitable seat for the tension rod. In its finished condition the fulcrumwill appear as shown in Fig. 7

In the modification shown in Figs 8 to 13 inclusive the bar is the samebeing composed of two sections 2 1-, 25, having registering openingstherein of asize corresponding to the semicircular openings in the formjust described. in the openin s I prefer to mount a. split ferrule 26which acts as the filler andsupplies the metal necessary forreinforcement. Through. the center of the ferrule there is a smallopening 27. After the parts are combined, as shown in Figs. 8, 9 and 10,they are placed in a die such as shown in Fig. 11, the lower member 28of which has a pointed projection 29 adapted to enter the opening 27 inthe ferrule or filler while the top member 30 is shaped to cooperatetherewith and to rivet the ferrule and spread the metal of the bars.Thus the size of the opening is increased and reinforced and the fulcrumis permanently joined. The finished article is shown in Figs. 12 and 13.Y j

Obviously the invention is capable of much modification and I do notwish tobe limited except as indicated in the appended claims. i

I claim: p

1. The method of making brake beam fulcrums which consists in preparingduplicate flat bars,then punching in the two bar openings of a size'lessthan the diameter of the rod to be accommodated therein, then insertinga metallic filler adapted to occupy the opening thus formed, thenforging the bars to increase the size of the opening, and to spread andrivet th'efiller around the sides of the opening. a

v 2, "The method of making fulcrums which consists'in' providing a pairof flatbars, then punching relatively small openings therei.i1,theninserting a metallic filler adapted to occupy the opening thus formed,then placing said bars in juxtaposition with the filler of metalpartially closing the thus formed openings, then forging the barstoincrease the size of'the opening through the associated bars andriveting the filler meta-l. around the sides of the opening.

3. The method of making brake beam ful crums which consists in punchinga pair of flat bars and causing'the punched metal to be'displacedlaterally and to lie on one side I of the opening, thenjoining the two bars and causing the displaced metal. of each bar tooccupy the opening formed in theopposite bar,-then forging the metal toenlarge the opening and rivet over the interengaging portions of thebars.

4. The method offorging fulcrums which consists in preparing a pair offlat bars, then punching semicircular openings therein, the

punched metal being caused to project laterally at right angles from thebar and to be of a shape corresponding to the shape of the punched-outopening provided, the latto be of a shape corresponding to the shape ofthe punched-out opening provided, the laterally projecting portions ofthe two bars occupying relatively opposite positions whereby they mayinterfit,-a small clear opening being providedthrough the two bars topermit the entranceof the point of a forging die. I i

6. A." brake beam fulcrum comprising-in combination two flat bars bentto provide means for attachment to a'brake beam, each bar having anintegral lateral projection, the projections on thetwo bars interfittingand being forged to rivet together the two bars and provide a fiaringseat for a tension rod. l

7. A brake beam fulcrum comprising in combination a pair of barshaving'an open ing'for a tension rod, saidbars each having a lateralprojection adapted to project into said opening an d be riveted aroundthe same, the metal of the bars being laterally expanded by the forgingprocess.

Signed at Chicago, Illinois,-this 12th day of October, 1920.

CARL E. BAUER.

